Cover for a telephone handset



FIG. 1 is a right side perspective side of a cover for a telephone handset showing my new design;

FIG. 2 is a left side elevational view thereof, the right side elevational view being a mirror image;

FIGS. 3 and 4 are respectively top and bottom plan views thereof; and,

FIG. 5 is an end view thereof, the opposite end being a mirror image. 

The ornamental design for a cover for a telephone handset, substantially as shown and described. 